Check Example 13 Introduction
Advertisement
Advertisement
Last updated at Jan. 3, 2019 by Teachoo
Transcript
Ex 3.7, 2 Three boys step off together from the same spot. Their steps measure 63 cm, 70 cm and 77 cm respectively. What is the minimum distance each should cover so that all can cover the distance in complete steps? Check Example 13 Introduction Steps of 3 boys are 63 cm, 70 cm & 77 cm We need to find, Minimum Distance they have walked such that they are together again Now, Distance walked by them will be greater than 63, 70, 77 So we find LCM LCM of 63, 70, 77 LCM = 2 × 3 × 3 × 5 × 7 × 11 = 2 × 9 × 5 × 7 × 11 = (2 × 5) × 7 × 9 × 11 = 10 × 63 × 11 = 6930 ∴ Minimum distance walked by them = 6930 cm
Statement questions on LCM
What is the smallest number when divided by numbers 2, 4, 6 gives remainder 0?
What is the smallest number when divided by numbers 2, 4, 6 gives remainder 7?
Example 14 Important
Ex 3.7, 8
Ex 3.7, 4
Ex 3.7, 9 Important
Ex 3.7, 5
Example 13
Ex 3.7, 2 You are here
What will be the smallest 3-digit number which divides 2, 4, 6 and leaves remainder 0?
What will be the greatest 3-digit number which divides 2, 4, 6 and leaves remainder 0?
Ex 3.7, 6 Important
Statement questions on LCM
About the Author